Drawing upon a multiple bottom line concept, which was originally developed for the business world, this article proposes a triple bottom line framework for analyzing and assessing the performance of international schools. The author contends that international schools can be broken down into three bottom lines: one "financial," one "academic" and "the intangible core". The framework aims to provide a mechanism (and a mindset) for educational leaders, suggesting that a balanced approach to each of the three bottom lines will provide students with a well-rounded education and offer leaders an approach to sustainable educational change. (Contains 1 table and 2 figures.)